Study On The Plant Phenology And The Functional Trait Of Flowering Twigs Of Woody Garden Plants

In this paper,36 species of woody garden plants under 5 habitat types in the main urban area of Chongqing were chosen to study the phenological characteristics and the functional traits of the flowering twigs.The five habitat types include urban commercial streets,roads,campuses,urban parks and country parks,with a total survey of 30 sites.First of all,to all kinds of woody landscape plants phenological observations and analysis reveals the beginning stage,flowering stage,flowering stage and the late flowering stage,buds open,lamina beginning,exhibition leaf stage stage,leaves,fruit,length,the growing season,blooming correlation between each other,analysis of the correlation between flower phenology,leaf phenology and fruit phenology,finding the differences of garden plants in different life types,under different habitat types and in different garden pruning modes,explored the relationship between environmental factors and garden plant phenology,and find the response strategies of each plant phenology and environment;Secondly,collected the plant in the field for processing,measured the branches of the stem length,stem diameter,stem dry weight,leaf number,leaf area,leaf dry weight,number of flowers,flower dry weight and leaf dry weight,and dry weight and the specific leaf area form data,such as analysis of the correlation between morphological characters,to explore the relationship between environmental factors and plant flowering plants and revealing the countermeasure mechanism of plant flower branch characters on environmental change was found;The last one,Analysis of plant phenology characteristics and traits of the correlation between,for the study of the specific plant to provide some basis for ecological adaptation strategy,and the urban landscape design and plant configuration provides some Suggestions.The main results are as follows:(1)There were significant differences in plant phenology of woody plants in 5 habitats.Among them,there is no significant difference between the city commercial street and the road,there is no significant difference between the campus and the city commercial street,and there are significant differences between the city commercial streets,campus and country parks.The flowering time of the commercial streets in the city is earlier,the leaf time is early,the leaves are late,the fruits mature early,the flowering period is longer,and the growth season is longer.The flowering time of country parks is relatively late,the leaves are late,the leaves are late,the fruits mature early,the flowering period is shorter,and the growing season is shorter.(2)There were significant differences in the flowering plants of woody plants in five habitats.Among them,the dry weight of the road,the dry weight of the petals and the dry weight of the pistils were significantly lower than the other habitat types.Stem length,stem diameter,stem dry weight,leaf number,leaf area and leaf dry on 5 kinds of habitat types,there was no significant difference compared with other habitat types of urban commercial street,leaf number,leaf area,leaf dry weight,bigger,smaler leaf area.(3)There were significant differences in the phenological phase of woody garden plants under two management modes.In the natural state,the flowering time of plants was significantly earlier and the flowering time was significantly longer.The flowering time in pruning state is later,and the flowering time is shorter.There was no significant difference in bud opening period,leaf opening period and blooming period in two management modes.Therefore,in the natural state,flowering is early and the flowering period is longer.(4)Two kind of management mode of woody landscape plants some squid traits have significant differences.Among them,the natural state,the number of flower plants,flowers,dry weight and leaf dry weight,and dry weight,leaf area,leaf dry weight,stem length,stem diameter significantly larger,leaf number significantly smaler;Cutting condition on the number of flowers,flower dry weight and leaf dry weight,and dry weight,leaf area,leaf dry weight,stem length,stem diameter significantly smaler,leaf number more significantly.Specific leaf area,stem is no significant difference in two kinds of management modes.Therefore,under the natural state.More flowers,ornamental effect is better.(5)The effects of different environmental factors on the phenological characteristics of woody garden plants were different.Among them,the increase of temperature,building area,rigid pavement area will promote early flowering plants,the early exhibition leaf,delay the fallen leaves,and extend the flowering and the growing season,altitude and the increase of vegetation coverage have the opposite effect;Factor of squid properties such as temperature,humidity,altitude effect is not obvious,building area of landscape pattern index of squid properties such as impact is bigger,and a building area of the greater the proportion,the greater the leaf dry weight,dry weight,etc.(6)There was significant correlation between woody plants and plants.The woody landscape plants show stage,flowering stage at the end of the beginning stage,flowering stage and flowering period has significant positive correlation,and open the flowering phenology and show that there was a positive correlation between the leaf phenology have negative correlation relationship with leaf stage.When plants bloom early,the flowering period is prolonged,mainly due to early flowering.The growth season is prolonged,mainly through the delay of the leaf.With evergreen shrubs,evergreen trees and deciduous shrubs,deciduous trees in the flowering phenology and open exhibition leaf phenology showed a significant negative correlation relationship,the reason is that first leaf after flowering plants in deciduous trees in bloom and lamina of trade-offs.(7)There is a significant correlation between the plant flowering plants of woody plants.Among them,the woody landscape plants stem length,stem diameter,stem have a significant positive correlation between dry weight,and the leaf area,leaf dry weight,flowers were very significant positive correlation,dry weight and leaf area was significantly negative correlation.However,the number of leaves and the number of flowers had a low correlation with other traits,indicating that the number of leaves and the number of flowers were relatively independent traits in the branchlets.In the woody landscape plants of different life forms cuttlefish character analysis,the general trend is consistent,but evergreen trees,strong correlation between stem and leaf of weak correlation between stem and flowers,evergreen shrubs had the highest correlation coefficient between the stem and flowers.(8)There was a significant correlation between the plant phenology and flowering plant.Woody garden plant phenology significantly correlation with cuttlefish traits and when the stem is heavier,flowering,lamina in advance,the delay of the leaves and fruit ripe period in advance and flowering,the extension of the growing season.At the same time,the number of leaves,single leaf area and single leaf dry weight increased,the flowers were in advance,the flowers were less,and the flowers were dry and heavy,and the flowers were dry.